import { contains } from "../utils/dom";
import { EVENT_OPTIONS_NO_CAPTURE, eventOn, eventOff } from "../utils/events";

// @vue/component
export default {
  data() {
    return {
      listenForClickOut: false
    };
  },
  watch: {
    listenForClickOut(newValue, oldValue) {
      if (newValue !== oldValue) {
        eventOff(
          this.clickOutElement,
          this.clickOutEventName,
          this._clickOutHandler,
          EVENT_OPTIONS_NO_CAPTURE
        );
        if (newValue) {
          eventOn(
            this.clickOutElement,
            this.clickOutEventName,
            this._clickOutHandler,
            EVENT_OPTIONS_NO_CAPTURE
          );
        }
      }
    }
  },
  beforeCreate() {
    // Declare non-reactive properties
    this.clickOutElement = null;
    this.clickOutEventName = null;
  },
  mounted() {
    if (!this.clickOutElement) {
      this.clickOutElement = document;
    }
    if (!this.clickOutEventName) {
      this.clickOutEventName = "click";
    }
    if (this.listenForClickOut) {
      eventOn(
        this.clickOutElement,
        this.clickOutEventName,
        this._clickOutHandler,
        EVENT_OPTIONS_NO_CAPTURE
      );
    }
  },
  beforeDestroy() /* istanbul ignore next */ {
    eventOff(
      this.clickOutElement,
      this.clickOutEventName,
      this._clickOutHandler,
      EVENT_OPTIONS_NO_CAPTURE
    );
  },
  methods: {
    isClickOut(evt) {
      return !contains(this.$el, evt.target);
    },
    _clickOutHandler(evt) {
      if (this.clickOutHandler && this.isClickOut(evt)) {
        this.clickOutHandler(evt);
      }
    }
  }
};
